Question Summary:
Is it true that the lifespan of the Ummah will be 1500 years?

Question Detail:

is it true that the lifespan of the ummah will be 1500 years?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Only Allah knows what will be the actual lifespan of this Ummah and when Qiyamah will come.
  Allah says in the Quran,
يَسْأَلُكَ النَّاسُ عَنِ السَّاعَةِ قُلْ إِنَّمَا عِلْمُهَا عِنْدَ اللَّهِ  
People ask you concerning the Hour, say: "The knowledge of it is with Allah only. 33:63)
 
And Allah Ta’āla Knows Best
Arshad Ali
Student Darul Iftaa
Trinidad
Checked and Approved by,
Mufti Ebrahim Desai.
http://www.daruliftaa.net/